hi,
thank you for providing the brief history of you.
A thorough examination of lungs and musculoskeletal assessment is advised.
As mentioned by you about the symptoms, there are two possibilities as per me.
1. it could be costochondritis
2. Intercoastal muscle spasm.
Now for this a thorough assessment will help guide us to look for the proper diagnostic procedure like an x-ray or a
CT scan. In CT even the lungs will be exposed and any pathology of it will be shown.
Based on this, with simple medication and
physical therapy you should perform well. Also, the physical therapy will teach you the best possible way of breathing exercises which will help improve the lung capacities.
In my clinical practice I see cases with similar issues and they respond well to physical therapy in combination to drug therapy.
Regards
Jay Indravadan Patel